Revision on Ionic Bond and Ionic Compounds

Which of the following is correct related to the positive ion?

• The number of protons is twice the number of electrons

• The number of electrons is twice the number of protons

• The number of protons equals the number of electrons

• The number of protons is greater than the number of electrons

Using the electron-dot structure of the following five default elements, which two elements form an ionic bond?

• X, Z

• Y, Z

• W, V

• W, Y

What charge do group 13 elements tend to acquire when they form ions?

• 3+

• 5-

• 3-

• 5+

Which of the following causes the brilliant colors of crystals in many ionic compounds such as precious stones?

• The attraction forces between ions

• Regular arrangement of ions in the crystal lattices

• The presence of transition metals in the crystal lattices

• The difference in size between positive ions and negative ions

Why is the Lattice energy of the compound (MgO) much larger than the lattice energy in the compound (LiF)?

( Atomic numbers are ( Li = 3, F = 9, Mg = 12, O = 8))

• The charge of lithium ion is greater than the charge of magnesium ion

• The charge of magnesium ion is greater than the charge of lithium ion

• Lithium-ion size is larger than the magnesium ion size

• The charge of Fluoride ion is greater than the charge of oxide ion

What create the property of luster in metals?

• Malleability, ductility

• Its presence in solid state

• High melting and boiling points

• The delocalized electrons interact with light, absorbing and releasing photons

All metals share the following Properties except

• Thermal conductivity

• Electrical conductivity

• Luster

• Physical state

Which property of tungsten W make it suitable rather than other metals in the manufacture of (bristles) Light bulb filaments?

• Thermal conductivity

• Electrical conductivity

• Malleability, ductility

• High melting points